The answer is D. Herring.
Whales, barracudas, and sharks are all fish, while herring is a type of fish. Herring is a small, oily fish that is often used in canned food. It is a member of the Clupeidae family, which also includes anchovies, sardines, and shad. Herring are found in both fresh and saltwater, and they are an important food source for many animals, including humans.
Whales are the largest animals on Earth. They are mammals, and they give birth to live young. Whales are divided into two groups: toothed whales and baleen whales. Toothed whales, such as dolphins and orcas, have teeth that they use to catch prey. Baleen whales, such as humpback whales and blue whales, have baleen plates instead of teeth. Baleen plates are made of keratin, the same material that makes up human hair and nails. Baleen whales use their baleen plates to filter food out of the water.
Barracudas are predatory fish that are found in tropical and subtropical waters. They are known for their sharp teeth and their aggressive behavior. Barracudas are often considered to be dangerous to humans, but attacks are rare.
Sharks are cartilaginous fish that are found in all oceans of the world. They are predators, and they eat a variety of animals, including fish, squid, and other sharks. Sharks are often feared, but most species are not dangerous to humans. However, there are a few species of sharks, such as the great white shark, that are considered to be potentially dangerous.